Plants

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Author:
schoenbe
ID:
262032
Filename:
Plants
Updated:
2014-02-19 15:26:15
Tags:
Bio
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Description:
plant life cycles
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  1. Ploidy of gametophyte and sporophyte
    • Gametohpyte: haploid
    • Sporophyte: diploid
  2. Characteristics of extant vascular plants
    • vascular tissue: xylem and phloem
    • multicelullar roots and leaves
    • sphorophyte dominant
    • have sphorophylls
  3. Xlyem
    • vascular tissue
    • -hollow
    • -dead
    • -for strength
  4. Phloem
    • Vascular tissue
    • transport nutrients
    • living
  5. what is the dominant life cycle in vascular plants?
    • sphorophyte dominant
    • not nutritionally dependent on gametophyte
  6. What is the function of sporophylls in vascular plants?
    they are modified leaves that hold sporangia
  7. What is the function of sporangia?
    They are the spore producing organ in vascular plants.
  8. What two structures allowed terrestrial adaptation in vascular plants?
    sporangia and sporopollenin walls.
  9. What type of spore production do seed plants undergo?
    Heterosporous spore production. Mega and micro spores are produced forming the male and female gametes.
  10. What type of spore production do seedless vascular plants undergo?
    Homosporous reproduction. One type of gametophyte.
  11. What phylum are quill worts, club mosses, and spike mosses in?
    phylum Lycophyta
  12. What phylum are ferns, horsetails, and whisk ferns in?
    Phylum Pterophyta
  13. What are the characteristics of seedless vascular plants?
    • sporophyte dominant (same as vascular)
    • need water to reproduce
  14. How are seedless vascular plants fertilized?
    Water is required for fertilization in order for the sperm to swim and reach the egg. Therefore they can only inhabit damp environments.
  15. True Ferns
    • Megaphylls
    • seedless vascular plant
    • produced clustered sporangia
  16. Sporangia in Ferns
    • Crow in clusters on underside of leaves (called sori).
    • catapulted from parent plants or are carried by wind
  17. What phylums contributed to the coal we use today?
    Lycophyta and Pterophyta. formed during carboniferous period.
  18. What is the most species rich gymnosperm?
    Coniferophyta
  19. Describe Coniferophyta.
    • conifer
    • cold dry habitats
    • gymnosperm
  20. Describe Ginkgophyta
    • all associated with human habitation
    • often chosen for street trees
    • gynosperm
  21. Describe Cycadeophyta
    • large cones and palm like leaves
    • gymnosperm
  22. Describe Gnetophyta
    • don't resemble conifers
    • tropical or live in deserts
    • gymnosperm
  23. Gymnosperm vs. Angiopserm
    • G-naked seed (like on pine cones)
    • A-container/vessel (seeds are within fruit)
  24. Gymnosperms
    • have a relatively "naked" seed
    • ovule and seed develop on surface of sporophylls (usually in cones)
  25. What are the four phyla of Gymnosperm?
    • 1. Ginkgophyta
    • 2. Gnetophyta
    • 3. Cycadophyta
    • 4. Coniferophyta
  26. Where are the Sporangia located on Gynosperms?
    located on the scale like leaves (sporophylls) in clusters, making up the cones
  27. What type of sporangia are on a full grown tree (gymnosperms)
    mega and micro on different branches
  28. What is the purpose of a pollen grain?
    To carry the sperm to the ovule, better system than non seed plants who require humid environments.
  29. Define a seed
    an embryo wrapped in nutrients for protection
  30. Where is the Megaspore produced (1n)
    inside the megasporangium (2n)
  31. What makes up the ovule?
    integuments, megasporangium and megaspore
  32. Where is the microspore (1n) produced?
    inside the microsporangium (2n)
  33. What is the purpose of sporopollenin?
    coats pollen grains to protect them (drying, UV etc)
  34. What is dominant and dependent in seed plants?
    sporophytes are dominant and gametopythes are dependent.
  35. What is dominant in Bryophytes?
    gametophyte dominant
  36. What is dominant in seedless vascular plants?
    sporophytes are dominant and gametophytes are independent
  37. List the five innovations of seed plants
    • 1. dependent gametophyte (protected)
    • 2. Heterospory
    • 3. Ovules
    • 4. Pollen
    • 5. Seeds

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